Virtuemart registration without shipment information

[broc93]

Hello! Here's my account creation page http://prodotti-dieta-erbalife.it/il-mio-account/edit but I want users to register to my website even without adding the shipping information. Anyway, if I remove those fields from virtuemart "Show in account management" column in the customer fields page I don't see anything even in the cart page. How can I solve this issue? Shall I use the Joomla! registration instead of the virtuemart one? :S
Thank you in advance